Very Concerned About A Travelling Cake...

So a friend has asked me to do a baby shower cake, and I'd love to do it. BUT...I have a couple of issues with it that I'm hoping y'all can help with.

My main concern is the fact that the cake has to travel about 80 miles through S Louisiana. It will be a 3 tier cake, covered in fondant and scrollwork, with a gumpaste bow topper. The last time I travelled with a stacked/dowelled 3-tier, it was a DISASTER with a capital D. The roads were under construction and even driving like 3 mph, the cracks in the cake were terminal. I DO NOT want to repeat that experience lol !

There's no way I'll send this cake out of here without COMPLETE assurance that it'll arrive in pristine condition, and I'm not carting it down there myself to assemble on site.

SO...I've never tried SPS because I'm just a hobby baker and can't budget this expense for give-away cakes. Will SPS help here? How can SPS help if the roads aren't so good? I know many of you do large cakes, and they travel stacked. How do you insure they make it there without cracks, sliding tiers, etc?

By the way, sorry if I'm asking a question that's been asked a hundred times. I did a search, but I never know exactly how to word things so that I don't get a thousand random threads. Thanks, y'all!

I traveled 4 hours over bumpy country roads with a 4 tier cake using SPS. (It's the SFA Graduation cake in my photos) It made it there just fine. Whoever is driving yours still needs to be carefull, but I think it will make it there with no problems.